__________ is the term used to describe the point at which Earth is closest to the sun. aAphelion bEquinox cPerihelion dSolstice

What is the term used to indicate the point where the Sun is at the nothernmost position?

When a planet's orbit takes it closest to the Sun, it's calledGroup of answer choicesperihelionvernal equinoxcrossing the ecliptic.aphelionNone of these; a planet's distance from the Sun never changes.

The equinox is an astronomical event where the Sun is directly above the Earth's ______________________________.Group of answer choicesNorth PolePrime MeridianEquatorSouth Pole

. Name the unit which is used to express distances between the various celestial bodies (like stars and planets).

How far away (in ly) is the star closest to the Sun? lyWhat is its name?PolarisProxima Centauri    SiriusTau Ceti